ballerina, 110 bytes

Result

AC

Duration

5226ms

Code [DL]

import ballerina/io;public function main(){while(true){string s=io:readln("");io:println(s[s[1]==s[2]?2:4]);}}

stdin

144 441
511 563
563 968
193 931
125 326
521 117
994 345
673 377
855 764
733 332
462 668
144 885
133 935
355 283
977 547
131 138
177 751
563 598
766 764
727 223
787 677
952 223
572 952
293 385
837 994
616 228
756 564
711 179
421 194
258 535
277 226
571 762

stdout

4
1
9
9
3
1
3
3
5
3
6
4
3
5
7
1
7
5
6
2
6
2
9
3
9
2
5
1
1
5
7
7

stderr

Compiling source
	code.bal
Running executables

error: java.util.NoSuchElementException message=No line found
	at ballerina.io:readlnExtern(read.bal:30)
	   ballerina.io:readln(read.bal:27)
	   code:main(code.bal:1)

strace